/*
 * Copyright 2022 Google LLC
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#ifndef SkFeatures_DEFINED
#define SkFeatures_DEFINED

#if !defined(SK_BUILD_FOR_ANDROID) && !defined(SK_BUILD_FOR_IOS) && !defined(SK_BUILD_FOR_WIN) && \
    !defined(SK_BUILD_FOR_UNIX) && !defined(SK_BUILD_FOR_MAC)

#ifdef __APPLE__
#include <TargetConditionals.h>
#endif

#if defined(_WIN32) || defined(__SYMBIAN32__)
#define SK_BUILD_FOR_WIN
#elif defined(ANDROID) || defined(__ANDROID__)
#define SK_BUILD_FOR_ANDROID
#elif defined(linux) || defined(__linux) || defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__sun) ||          \
    defined(__NetBSD__) || defined(__DragonFly__) || defined(__Fuchsia__) || defined(__GLIBC__) || defined(__GNU__) || \
    defined(__unix__)
#define SK_BUILD_FOR_UNIX
#elif TARGET_OS_IPHONE || TARGET_IPHONE_SIMULATOR
#define SK_BUILD_FOR_IOS
#else
#define SK_BUILD_FOR_MAC
#endif
#endif // end SK_BUILD_FOR_*


#if defined(SK_BUILD_FOR_WIN) && !defined(__clang__)
#if !defined(SK_RESTRICT)
#define SK_RESTRICT __restrict
#endif
#endif

#if !defined(SK_RESTRICT)
#define SK_RESTRICT __restrict__
#endif

#if !defined(SK_CPU_BENDIAN) && !defined(SK_CPU_LENDIAN)
#if defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
#define SK_CPU_BENDIAN
#elif defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)
#define SK_CPU_LENDIAN
#elif defined(__sparc) || defined(__sparc__) || defined(_POWER) || defined(__powerpc__) || defined(__ppc__) || \
    defined(__hppa) || defined(__PPC__) || defined(__PPC64__) || defined(_MIPSEB) || defined(__ARMEB__) ||     \
    defined(__s390__) || (defined(__sh__) && defined(__BIG_ENDIAN__)) || (defined(__ia64) && defined(__BIG_ENDIAN__))
#define SK_CPU_BENDIAN
#else
#define SK_CPU_LENDIAN
#endif
#endif

#if defined(__i386) || defined(_M_IX86) || defined(__x86_64__) || defined(_M_X64)
#define SK_CPU_X86 1
#endif

/* *
 * SK_CPU_SSE_LEVEL
 *
 * If defined, SK_CPU_SSE_LEVEL should be set to the highest supported level.
 * On non-intel CPU this should be undefined.
 */
#define SK_CPU_SSE_LEVEL_SSE1 10
#define SK_CPU_SSE_LEVEL_SSE2 20
#define SK_CPU_SSE_LEVEL_SSE3 30
#define SK_CPU_SSE_LEVEL_SSSE3 31
#define SK_CPU_SSE_LEVEL_SSE41 41
#define SK_CPU_SSE_LEVEL_SSE42 42
#define SK_CPU_SSE_LEVEL_AVX 51
#define SK_CPU_SSE_LEVEL_AVX2 52
#define SK_CPU_SSE_LEVEL_SKX 60

// TODO(brianosman,kjlubick) clean up these checks

// Are we in GCC/Clang?
#ifndef SK_CPU_SSE_LEVEL
// These checks must be done in descending order to ensure we set the highest
// available SSE level.
#if defined(__AVX512F__) && defined(__AVX512DQ__) && defined(__AVX512CD__) && defined(__AVX512BW__) && \
    defined(__AVX512VL__)
#define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_SKX
#elif defined(__AVX2__)
#define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_AVX2
#elif defined(__AVX__)
#define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_AVX
#elif defined(__SSE4_2__)
#define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_SSE42
#elif defined(__SSE4_1__)
#define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_SSE41
#elif defined(__SSSE3__)
#define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_SSSE3
#elif defined(__SSE3__)
#define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_SSE3
#elif defined(__SSE2__)
#define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_SSE2
#endif
#endif

// Are we in VisualStudio?
#ifndef SK_CPU_SSE_LEVEL
// These checks must be done in descending order to ensure we set the highest
// available SSE level. 64-bit intel guarantees at least SSE2 support.
#if defined(__AVX512F__) && defined(__AVX512DQ__) && defined(__AVX512CD__) && defined(__AVX512BW__) && \
    defined(__AVX512VL__)
#define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_SKX
#elif defined(__AVX2__)
#define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_AVX2
#elif defined(__AVX__)
#define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_AVX
#elif defined(_M_X64) || defined(_M_AMD64)
#define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_SSE2
#elif defined(_M_IX86_FP)
#if _M_IX86_FP >= 2
#define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_SSE2
#elif _M_IX86_FP == 1
#define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_SSE1
#endif
#endif
#endif

// ARM defines
#if defined(__arm__) && (!defined(__APPLE__) || !TARGET_IPHONE_SIMULATOR)
#define SK_CPU_ARM32
#elif defined(__aarch64__)
#define SK_CPU_ARM64
#endif

// All 64-bit ARM chips have NEON.  Many 32-bit ARM chips do too.
#if !defined(SK_ARM_HAS_NEON) && defined(__ARM_NEON)
#define SK_ARM_HAS_NEON
#endif

#endif // SkFeatures_DEFINED
